Radioactive Tracer
Mostrando 13-24 de 65 artigos, teses e dissertações.
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13. THE USE OF TWO RADIOACTIVE ISOTOPES OF IRON IN TRACER STUDIES OF ERYTHROCYTES 1
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14. Radioactive Tracer Studies of the Metabolic Fates of Intracellularly Generated NADH and NADPH in Higher Plant Tissues 12
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15. Methods for the Measurement of a Bacterial Enzyme Activity in Cell Lysates and Extracts
The kinetic characteristics and regulation of aspartate carbamoyltransferase activity were studied in lysates and cell extracts of Helicobacter pylori by three diffirent methods. Nuclear magnetic resonance spectroscopy, radioactive tracer analysis, and spectrophotometry were employed in conjunction to identify the properties of the enzyme activity and to val
Biological Procedures Online.
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16. STUDIES IN PHOSPHORUS METABOLISM IN MAN. III. THE DISTRIBUTION, EXCHANGE AND EXCRETION OF PHOSPHORUS IN MAN USING RADIOACTIVE PHOSPHORUS (P32) AS A TRACER 1
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17. Compartmental Utilization of Carboxyl-14C-Tripalmitin by Tissue Homogenate of Pine Seeds 1
A tissue homogenate of megagemetophyte of germinating seeds of Jeffrey pine (Pinus Jefferii Grev. and Balf.) was incubated with sonication-dispersed and albumin-carried 14C-tripalmitin in order to elucidate the sequential and quantitative role of cellular organelles in utilizing lipid reserve in seeds. After 5 minutes at 30 C, 25% of the tracer was localized
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18. STUDIES ON NEOPLASMS WITH THE AID OF RADIOACTIVE PHOSPHORUS. III. THE PHOSPHORUS METABOLISM OF THE PHOSPHOLIPID, ACID SOLUBLE AND NUCLEOPROTEIN FRACTIONS OF VARIOUS TISSUES OF NORMAL AND LEUKEMIC MICE FOLLOWING THE ADMINISTRATION OF “TRACER” AND “THERAPEUTIC” DOSES OF RADIO-PHOSPHORUS1
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19. Sampling Submicron T1 Bacteriophage Aerosols
Liquid impingers, filter papers, and fritted bubblers were partial viable collectors of radioactive submicron T1 bacteriophage aerosols at 30, 55, and 85% relative humidity. Sampler differences for viable collection were due to incomplete physical collection (slippage) and killing of phage by the samplers. Dynamic aerosols of a mass median diameter of 0.2 μ
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20. BIOSYNTHESIS OF RIBOSE AND DEOXYRIBOSE IN PSEUDOMONAS SACCHAROPHILA1
Fossitt, Dexter D. (University of Michigan, Ann Arbor), and I. A. Bernstein. Biosynthesis of ribose and deoxyribose in Pseudomonas saccharophila. J. Bacteriol. 86:1326–1331. 1963.—The biosynthesis of ribose and deoxyribose in Pseudomonas saccharophila was studied by radioisotope-tracer techniques. Patterns of C14 in ribose isolated from the nucleic acids
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21. Tracer microinjection study of renal tubular phosphate reabsorption in the rat
To determine the sites of tubular phosphate reabsorption in the nephron, microinjection studies were undertaken, utilizing isotonic electrolyte solutions, containing either 1.4 or 8.0 mM phosphate and radioactive PO4-33P and inulin-3H, in rats made mildly diuretic by infusion of mannitol. The injected sites were localized by the technique of latex dissection
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22. Simple test of intestinal calcium absorption measured by stable strontium.
A clinical test of intestinal calcium absorption has been developed using non-radioactive stable strontium as a calcium tracer. In nine elderly subjects there was a close correlation between the fractional absorption of strontium and radioactive calcium (45Ca) during a five hour period after the simultaneous oral administration of the two tracers. Comparable
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23. Extracellular fluid deficit following operation and its correction with Ringer's lactate. A reassessment.
The changes in extracellular fluid volume (ECV) in two groups of surgical patients, one receiving Ringer's lactate solution intraoperatively and the other receiving only dextrose and water, were assessed. A deficit in the ECV, as measured by radioactive sulfate, of 1.9 +/- 0.8 l (p less than 0.003) compared to the preoperative volume was found in the dextros
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24. Degradation of abnormal proteins in intact mouse reticulocytes: accumulation of intermediates in the presence of bestatin.
Incubation of intact mouse reticulocytes with bestatin (a competitive inhibitor of aminopeptidases) produced the accumulation of low molecular weight intermediates in the degradation of puromycinyl-peptides or analog-containing proteins that had been pulse labeled with L-[1-14C]leucine. A large fraction of the radioactive protein was degraded to trichloroace